南水北调中线工程大型跨流域调水渠道倒虹吸工程设计

Large Water Transfer Channel Inverted Siphons Design in Middle Line South-North Water Transfer Project

南水北调中线工程河北省北段总干渠长227.155km,沿途穿过太行山东麓浅山丘陵与平原交接地带,渠道沿线交叉建筑物共322座。其中渠道倒虹吸工程13座,总长13.335km,属总干渠上的主要建筑物,工程设计标准为一等,建筑物级别为1级,防洪标准为100年一遇洪水设计,300年一遇洪水校核。对口门宽度、结构型式、进出口布置等均进行了多方案比选和优化。

The distance of the north segment channel in Hebei province of middle line south-north water transfer project is 227.155km.It's across from the connection of east low hill of Taihang mountain and plain. The total Numbers of the crossover buildings are 322,include 13 channel inverted siphons, which are 13.335km long.The channel inverted siphons are the main buildings of the middle line channel. It's design standard is first order, building level is first too, and for it's flood prevention standard, design is 100-year frequency flood, check is 300-year frequency flood. This paper discussed the progressive flood width, structure style, lay-out of inlet and outlet, also it gives the comparison of multiple project lay-out and the optimal design.